A scifi horror RPG about humans in an alternate 1950s - who discover
and resist Section 44, a robotic conspiracy that threatens to replace
all of humanity. Play proceeds in 4 rounds where in a round each
player frames one scene. Characters may be replaced by robots, in
which case they continue to play and work to replace the others.
Character creation is limited point-based, with players assigning
6 points among three qualities (Resolve, Contact, and Material),
3 points among Bonds (other people), and 4 points among
player-defined Anxieties. Resolution is scene-based, with
player and GM rolling a number of d6s for stat + modifiers, and
taking the highest result, +1 for every tie for highest.
37 pages (PDF).

A post-apocalypse science fantasy setting, with various alien races
mixed with tribal humanity. An expanded version with GM-only
information is available in print (not free). Character creation
is point-based.
~60 pages basic rules and background (HTML).

A humorous narrative space opera RPG, where players define their
PC with a one-word Style, and roll 1d6 to enact plot changes to
get both success/failure and a random Word of Science to
incorporate into the plot.
7 pages (PDF,HTML).

A sci-fi RPG about characters permanently stranded on an
uninhabited planet after an interstellar war has wiped out
their homeworlds. It uses a dice pool system, taking the lowest
die rolled where 1-5 is a success but each "1" loses you that die.
Different advantages give you different die types from d4 to d10.
22 pages playtest rules (PDF).

The "Fast-Play" version of the (out-of-print) commercial sci-fi
RPG rules. This is available along with many other downloads
including adventures and supplements.
Players Book 13 pages (PDF).
GM's Book 13 pages (PDF).
Warships Sourcebook 112 pages (PDF)

A complete, stand-alone RPG adventure with pre-generated
characters set in a high-action cyberpunk future. The Player File
includes quick-play rules and pregenerated characters; the
Scenario File for the GM includes the adventure. The rules and
setup are similar to Lady Blackbird - a dice pool system
where every even number rolled is a success, gaining dice
from the descriptor for the Trait used, as well as Stunt Dice
spent. Experience is by Keys fulfilled.
36 pages Player File, 72 pages Scenario File (PDF).

A game set in 3050 where Earth, Venus, and Mars are under
tyrranical rule by the Syndicate (including the non-human vampiri
and Venusian elves), using a very simple dice pool system similar
to Shadowrun. Character creation is random-roll attributes with
a random number of bonus points.
~5 pages rules (HTML) plus ~10 pages background.

An RPG adaptation of the cyberpunk manga Appleseed by
Masamune Shirow, using a variant of West End's "D6 Legen"
system. The core mechanics are included with the rules, although
it recommends having the rules in addition.
~60 pages rules and background (HTML).

Ardent Offense is a minimalist system with some optional
mechanics of traditional role-playing. It includes a detailed
examination of role-playing philosophies and a brief
modern/futuristic setting.
14 pages (PDF, HTML).

A dark science fantasy RPG set in a place known only as "The City",
the preview version of a print RPG to be published in 2003.
It has advanced technology but also is plagued by the remnants of
a magical cataclysm known as "The Shift". It uses a percentile
skill-based system (roll under stat/skill on 1d100). Character
creation is limited point-based (attribute points and skill points),
with various origins and occupations offering suggested skills.
There are no ads/disads.
62 pages (PDF).

A hard science-fiction spacefaring RPG -- the abbreviated version
of the published game available on CD-ROM. Action resolution uses
the concept of "Failure Dice". You can choose to roll any number of
d10's. That number is added to your skill, but any die which is
that number or less is a failure which subtracts 2 from your
total. Thus, more dice allows better results but is riskier.
Character creation is open point-based.
56 pages quick-start guide (PDF), plus several additions
including two 28-page alien species guides.

A demo version of the published modern conspiracy RPG by Eden
Studios. PC's are agents of Aegis, a secret organization at work
within the U.S. government fighting alien and supernatural
menaces. It uses a simple system with 5 levels of skill and
difficulty. If your stat is greater than the difficulty, success
is automatic. If it is equal, you must roll 7 or less on 2d6.
If it is one less, you must roll 4 or less.
16 pages (PDF).

A universal system, which balances PC's by the principle that a
more powerful PC (i.e. higher total attributes) will have
critical failures happen more often. Actions are resolved by
rolling under (stat or skill)*4 on percentile dice. There are
personality traits ("Aspects") that determine the points
available in different skill groups. It includes a setting
book entitled "Earth Unmasked" -- about an alternate 2025
where aliens and supernatural monsters have emerged.
119 pages core rules (PDF or HTML) plus 151 page setting book (PDF)

A cyberpunk/fantasy mix, set in a near-future where magic returned
to Earth, resulting in a world war. The war was ended by an army
of cyber- and magic-enhanced super-soldiers created by the U.S.,
Australia, and England. It uses a variant of the
Fudge system.
51 pages (PDF).

A simple "RPG/dice game", where the PCs are sentient robots
(called Cybers) on the world Cyberia. Some robots are turned
into rampaging monsters by an errant virus. It uses a special
3d6 roll for contests, where a basic roll is always subtracted
from the opponent's point total. Character creation is open
point-based.
27 pages (PDF).

A playtest document of an action/adventure retro sci-fi game
in the vein of the old Flash Gordon and Buck Rogers serials.
The player characters are members of the elite Danger Patrol —
super-powered crime fighters who protect Rocket City from
various threats. Character creation includes picking a Style
(Alien, Atomic, Ghost, Intrepid, Mystic, Psychic, Robot, or
Two-Fisted) and a Role (Agent, Commando, Daredevil, Detective,
Explorer, Flyboy, Warrior, or Professor). Resolution is by
a dice pool system using a mix of dice (1d4 to 1d12), where
every 4+ is a success and every 1-3 is a danger.
35 pages playtest rules (PDF).

A cyberpunk game set in 2031, using a simple 2d6-based
system (skill+2d6+mods, needing 12 or more to succeed).
Character creation is point-based.
25 pages rules (HTML and MSWord) plus ~15 pages background (HTML).

A futuristic fantasy-horror game, set in 2066 in a grim cyberpunk
future where PC's are the "Warbreed" -- creatures created by the
dark gods (the "Ashura") and left on Earth in ancient times, who
now fight for the Earth against their creators. Character
creation is breed and class based, with point-bought attributes.
The resolution system is not clear.
~45 pages MSWord format.

A post-magical-apocalypse RPG set in the year 4469 after a
great Fall. The world is is replete with feudal kingdoms,
magic, demons, elves, dwarves, gnomes, and halfings -- along
with advanced technology in underground cities which survive
against the poisoned world. The system is roll under
attribute + skill on 1d20, with the roll indicating
level-of-success. Character creation is open point-based.
~80 pages rules (HTML).

A post-nuclear-apocalypse survival RPG, the 51-page free version
of the 174-page published game from
Anarchy inK.
Available free after web registration. It uses a d6 dice-pool
system with random-roll character creation including 100
mutations (1000 in the published version!).
51 page Players Handbook (PDF), 101 page GM handbook expansion (PDF).

A German-language post-apocalyptic RPG, a free download with
identical content to the commercially published book. It uses
a system based on 2d10 roll-under-skill.
380 pages rules and background (PDF).

An RPG set in the world of the computer game "Doom", where
futuristic portal research opens a gateway to hell. It uses a
simple percentile system (roll under stat on d100). Character
creation is by random-roll attributes, and each skill has a
starting value by averaging 2 attributes.
136 pages PDF or text.

A "Mutant Adventuring" supplement for Fourth Edition D&D that tries
to emulate Gamma World while staying compatible and balanced with
core D&D4. It introduces new races, classes, powers, equipment,
and creatures/NPCs along with a few rules changes such as modified
skills.
347 pages rules (PDF).

The creative-commons-licensed version of the commercial sci-fi
RPG released in 2009, set in a far future. It uses a percentile
skill-based system (roll under skill on 1d100).
402 pages rules and background (PDF format).

A science fiction RPG set on a planet ("Entalis") which is key to an
interdimensional gateway. It uses a percentile, skill-based
system. Character creation is random-roll attributes and
occupation-based skills with point-bought skill advancement.
~80 pages rules and background (HTML).

A space opera RPG closely based on "Star Trek", attempting for
less pseudo-science and more cinematic feel. It uses a dice-pool
system, taking highest of Nd6 where the number depends on how
many traits apply to the task. Character creation consists of
picking freeform traits (i.e. "Security Officer" is a sample
trait).
71 pages (MSWord format).

A semi-RPG where each player designs a species and plays an
example of that species. Each session the players play members
of their species interacting, and then between session they can
"evolve" their species.
12 pages MSWord format.

A science fiction RPG set in a universe where technological Templars
fight in the name of the Intergalactic Government and Church
(IGAC). Action resolution is rolling under stat on a number
of d10s (1d10 to 5d10 or more) where the number of dice depends
on difficulty. Character creation is open point-based, and
includes plot points.
32 pages rules and background (PDF).

A post-nuclear-apocalypse RPG set after a nuclear war in 2077,
based on the computer game by Interplay. It uses a simple
percentile system with limited point-based character creation.
157 pages core rules (PDF), plus several sourcebooks.

Previews of a futuristic space-opera RPG, set in an alternate
universe in a human-populated solar system in the midst of a
devastating war that has be raging for over 100 years. There are
six major feudal houses who fight for control of the
sixteen-planet system. Currently this has a 16-page preview
of the combat system, which is based on stat + 1d10 + modifiers
rolls. Damage is done to a luck statistic, which controls the
the chance of a kill with the next attack.
16 pages combat system preview (PDF).

An adaptation of the science fiction film using the free RPG system
Cyno's Role-Play. It is set in the
23rd century, in the year 2259 A.D. This includes races, professions,
equipment, vehicles, and characters -- but not the basic rules.
~20 pages background (HTML).

An RPG adaptation of Fox's space-opera television series.
It includes notes on the locations, planets, moons, vehicles,
weapons, and technology used on the show. It includes notes
on the "Mayonnaise" system which is an adaptation of the
free Fuzion system, but not a complete
system by itself.
24 pages rules and background (PDF).

An RPG based on the manga of the same name by Mamoru Nagano.
Character creation uses random-roll attributes, a selected
template, and point-bought skills. Action resolution uses 1d20
plus stat or skill. The rules include a psionics system and
detailed equipment.
~50 pages rules and background(HTML).

A minimalist universal system in both English and Italian.
Character creation is by random-roll of 7 attributes. Resolution
is by attribute minus 2d6 minus difficulty. It includes a
small sci-fi setting ("Star Fresco") and a horror setting
("Frigor Mortis").
4 pages core rules (HTML and PDF) plus 5 pages sci-fi
setting (PDF) and 3 pages horror setting (PDF).

A generic science fiction system with involved combat.
Action resolution is by d20 + attribute + skill vs difficulty.
Character creation is by a combination of random-roll and
point-spending for the 16 basic attributes and 9 derived ones.
Skills are assigned through a class system.
334 pages rules (PDF).

A sci-fi RPG, set in 3407 where a unified galactic empire is
fighting invaders from another galaxy. It uses a percentile
skill-based system with point-bought character creation.
Basic Game 164 pages PDF format, plus various supplements:
including a mostly-complete 61-page equipment guide,
less complete other supplements, and ~30 pages of campaign info.

Giga is a far-future RPG set in the "United Earth Forces" which
maintain peace after cataclysmic racial wars among various
alien species. The rules include seven alien races.
Character creation uses random-roll attribute and class-based
selection.
~30 pages (HTML).

GigantoCorp is a game about capitalism gone tragically awry,
where company on the planet has been merged, bought out or
otherwise conglomerated into one gigantic corporation. It uses
Michael D. Mearls' Plain English
RolePlaying rules.
~15 pages background and character creation (HTML).

A multidimensional cyberpunk RPG, set in the pan-dimensional city
of Cynosure, a place where hundreds of dimensions coexist side by
side - cross the street, and reality changes. It uses a simple
percentile skill system.
~22 pages (text-only).

A humorous RPG about well-armed schoolchildren after an
apocalypse where a runaway nuclear reaction in the cafeteria has
turned teachers into flesh-eating demons. It uses a dice pool
system: roll (attribute+skill) d10's, where each die over the
difficulty is a success. Character creation is by random-roll
attributes and point-bought skills. Includes a brief sample
adventure.
46 pages text.

A Finnish-language "space noir" game set in far future 500 years
after a great disaster decimated and divided humanity. This is
the free version of a published game, using simplified
d6-based rules instead of the d10-based rules presented in
the commercial Heimot RPG corebook.
30 pages rules and background (PDF).

A preview of the commercial RPG Hellas: Worlds of Sun & Stone,
a space opera game in a setting inspired by Greek myth. It uses
a variant of the "Omni System" from Morrigan Press. Resolution
uses skill or attribute minus difficulty + 1d20, interpreting the
results on a universal degree of success table. There is also a
hero point system to change rolls.
22 pages rules and sample adventure (PDF).

An adaptation of Edgar Rice Burroughs' Barsoom setting to the
Fudge system. Includes links for rules
additions for combat, wealth, and fencing as well as character
creation guidelines.
~50 pages (HTML).

A general system aimed at the post-apocalyptic genre.
Character creation is open point-based, spending 100 points
plus 50 points per level among six attributes, skills, combat
abilities, and advantages. Combat resolution uses 1d20 plus
modifiers, but skill rolls are percentile. It includes notes
on world creation (how the world ends), community design, and
random adventure generation.
~40 pages HTML.

A cyberpunk RPG set in the dawn of the 22nd century, with corporations
having taken over the world. Humanity has branched into 10 different
artificially-created "genotypes" (Spectre, Rager, Savant, Shifter,
Morph, etc.). It uses a percentile skill-based system.
~80 pages rules (HTML).

A universal skill-based system with many genre supplements:
Magic, Cyberpunk, Fantasy, Horror, Supers, Psionics,
Chi Martial Arts, and Steampunk. It is quite detailed, but
there is a "rules-medium" version: JAGS-2.
Action resolution is roll under attribute or skill on 4d6-4.
Character creation is open point-based, with 3 primary
attributes and 9 secondary. Skills have a 4-level expertise
rating (Beginner, Average, Expert, Master) which determines
usage as well as a number to roll under (0 to 20).
200 pages basic rules (PDF) plus 150+ pages of supplements (PDF).

This is a freeform online game set in an original background.
Set in the 16th millenium, humanity has expanded into an enormous
lattice of worlds artificially created by an unknown race of
builders. Each is linked to 8 other worlds by a portal in the
center.
~2 pages freeform rules (HTML) plus ~30 pages background (HTML).

The free version of a space opera RPG using the Instant Fuzion
rules. It is set in the galaxy of the 27th Century, where the
PC's are Federation Rangers (a cross between the French Foreign
Legion, the Texas Rangers, and bounty hunters). The commercial
PDF download is 216 pages.
36 pages rules (PDF) plus 35 pages "Psi Rangers" supplement
(PDF) and 17 page "StarForce" supplement (PDF).

An Italian science fantasy RPG, with a rules system leaning towards
realism and accuracy. The game is split into four manuals: Ambient,
Characters, Rules, and Magic.
Rules and background 141 pages (PDF).

A simple roleplaying system using skill+2d6 (with no pre-defined
skills), coupled with a multi-genre universe called
"Universe 13", which has a dozen worlds of which roughly
half are described.
~6 pages rules and ~30 pages background (HTML).

A sci-fi RPG set on Mars in the year 2040 with details about the
colonization, environment, and so forth. It is intended for less
action-oriented play. It uses a minimalist system, also written
up as a generic system called The Ladder.
There is a 5-step stat scale, used by rolling 1d6, where a 1
indicates a poor result, 2-5 average, and 6 good.
~40 pages rules and background (HTML).

An adaptation of the dark-future virtual-reality movie using
West End Games' D6 system (including complete "D6 Classic" and
"D6 Legend" versions). It includes complete basic rules but
recommends getting a copy of the original rules from WEG.
54 pages rules and background for either version
(MSWord, PDF, and HTML).

A free preview of an upcoming anime scifi game. It uses a dice pool
system, rolling a number of dice equal to attribute, where every
roll that is equal or lower than skill is one success. Any die that
comes up "1" counts as a success and is rerolled. Any roll with
8 or more successes lets the player define a "cut scene" and take
and extra action. Players also take turns defining personal scenes
(either social, field ops, or repair) to improve stats. The
quickstart has four pregenerated characters but no character
creation rules.
24 pages rules (PDF).

This is the commercial version of an out-of-print sci-fi RPG
where the PCs are human minds in robot bodies (known as
"metalfaces"). It is set in the mid-22nd century, complete with
robots, huge cities, mutant humans, space travel, corporate
warfare and a bit of spirituality. Action resolution is by
rolling 1d10 to 5d10 (depending on difficulty) under character
stat. Character creation is by selecting a model and class of
robot body, plus point-bought skills.
63 pages PDF format.

A minimalist sci-fi RPG set in a far-flung future where the
galaxy is run by a trio of corrupt Tyrants who further The
State's iron grip on its people. The PCs are Rockers who
fight oppression with both physical and musical violence,
typified by the leather-clad bad-ass wielding a smoking
shotgun with a guitar slung over his shoulder. The system
has three stats. Actions are resolved by rolling d20s
equal to stat, where the highest result is Power and number
of matches is Control.
~8 pages rules (HTML).

A post-apocalyptic storytelling game. The players decide on
what sort of apocalypse happened, and then proceed to set up
scenes that the Game Blaster (GM) sets up. The scene and
character reactions are determined by rolling ThunderBones:
two six-sided dice, the Grim Die and the Zany Die. Whichever
is higher determines the overall tone of the scene and of
individual character reactions.
33 pages rules (PDF).

A worldbook for the Fudge system. A group
of adventurer-scientists whose exploits were never recorded in
the annals of cinematic heroes, explorers of the 19th and 20th
centuries, pulp adventure stories of the 1930's, and supernatural
investigative fiction and RPGs set in the 1920's.
96 pages PDF.

A simple universal RPG system. Actions resolution is by drawing a
playing card (or rolling 1d10) under attribute + skill. Modifiers
are by adding bonus or penalty draws -- keepign the best/worst
of the cards. Players can spend Karma points for successes.
It includes three settings: a cross-genre setting (All-Worldz),
a dark fantasy setting (Erebus), and a adaptation of "The
Matrix". There are also two adventures.
~15 pages basic rules plus ~80 pages background (HTML).

A sci-fi game about interstellar war with an ant-like hive race,
set in 2250. It uses a simple skill-based system, rolling a
step-die (d4 to d20 based on difficulty) under skill.
~35 pages rules (HTML or WRI format).

A cyberpunk RPG set in a unique world. Half of the material is
freely browsable, the other half is available on email request.
The system uses attribute + skill + d6 vs difficulty.
~30 pages rules (HTML) plus ~80+ pages background (HTML).

A cyberpunk RPG where the PCs are bioengineered "super varans"
created only to finish their missions, which usually includes
shooting tens, even hundreds of humans or other things.
~20 pages core rules (HTML) plus ~15 page GMs section (HTML).

A system based on the urban fantasy novel and BBC TV series by
Neil Gaiman, set in an underworld realm below modern London.
It uses a minimalist system where characters are rated by
5 adjectives from their description, plus skills (with five
levels: Beginner to Legend). Action resolution is 1d10 +1 for
each adjective + skill vs difficulty.
76 pages rules and background (PDF).

A science fantasy RPG based on an extensive variant of the D20 system,
set in an interdimensional Nexus - a realm that connects to other
realms, but also contains its own islands floating in a vast
astral sea. There are levels and races but no classes, and no
base attack bonus or saving throws. Instead there is a custom
character framework, and the system focuses more around skills.
There are many feats, each associated with a skill. It also
includes a new magic system with powers rather than spell lists.
100+ pages HTML.

A formerly free RPG now available in print or in PDF format.
The original free version was ~40 pages in HTML compared to
120 pages (PDF or print) for the current commercial game.
It is a post-apocalyptic RPG set amidst "trash-culture" America.
It uses a dramatic system where 3d6 is rolled, and as long as
one die is 4 or higher, the player gets to call the shots.
A higher stat increases the rewards for a success, but not
the chance of success. Character creation is limited point
bought.
120 pages (PDF).

A sci-fi game using a skill-based, step-die system -- where
stats are rated from 1 (d4) to 5 (d12). Character creation
uses a simple point system spending 1d4+3 points for attributes
and skills.
~20 pages rules (HTML).

A superhero RPG based on the WotC "D20" system, used in 3rd edition
Dungeons and Dragons. It contains new races, new classes, and
superpower rules. It includes a sourcebook for "Vancouver 2020",
a shared-universe superhero setting.
104 pages basic rules (PDF or MSWord) plus
120 pages background (PDF or MSWord).

A science fantasy RPG with the campaign world of "Earth:2230",
with FTL travel, aliens, cyberware, and magic. It uses a
percentile skill-based system. Character creation is
random-roll attributes plus open point-buy of skills,
advantages, and other aspects.
60 pages rules and background (MSWord).

"Player's Labor-Saving Utility System". This is a simple
dice-pool system where you compare the total to a target number,
with open-ended results. Character generation uses random-roll
core attributes (Luck, Body, and Age) , and point-bought
attributes and skills based on these. It includes numerous
setting adaptations, including an adaptation of the Jorune
setting from Skyrealms Publishing and of Space 1889 from GDW.
41 pages basic rules (PDF or text-only) plus
175 pages setting adaptations.

A space-fantasy RPG, where PCs are among the crew of a ship
charged with protecting the people of the planet Caliban and its
colonies. It is set among the ruins the Solar Federation, a
great society that once spanned thousands of worlds. It uses
a step-die system where characters have trainings rated from 1d4
to 1d10. Resolutin is by rolling a die from training, and possibly
bonus dice for an ally or gear, where each 4+ is a success.
Players can get reroll points by acting to increase tension
among the PCs.
30 pages playtest rules (PDF).

A post-apocalypse RPG set on a colony planet (Ad Tair) after
a devastating accident. Now humanity shares the planet with
six intelligent alien races, and struggles to rebuild. It uses
a simple dice pool system: roll (attribute + skill) d10s, with
each roll over difficulty counting as one success, and each "1"
rolled subtracting from successes. Character creation is
point-based, with archetypes for different species. There is
one supplement with new rules for drugs, merits/flaws, new
skills, psionics, equipment, and races.
95 pages core rules plus 32 page supplement (PDF).

The free version of the commercial science fiction game, with
a system similar to GURPS. Character creation is open
point-based, including a selected profession and race, fifteen
attributes, skills, talents, advantages, and disadvantages.
Action resolution is roll under skill plus modifiers on 3d6.
The free version includes combat and psionics rules, but no
background and only brief stats on equipment.
32 pages rules (PDF).

A scifi RPG in Swedish and English, based on the TV series
"Space: Above and Beyond". Action resolution is by stat + 2d10
vs difficulty, with some open-endedness.
34 pages core rules (MSWord), plus additional HTML files.

A shareware science fantasy RPG set on a giant generational
starship using mystic "Psycho-Manipulative Energy" that had a
catastrophic accident shortly after. The systems went
haywire and rewrote the environment and people to match
fictional characters and locales. The PCs are "Ringwielders"
that have entered into an agreement with the central computer
to protect all life on the ship, armed with rings that can
have up to 36 powers. Character creation is random-roll,
rolling for powers, the 8 primary abilities, and the 20
secondary abilities.
~15 pages plain text.

A post-apocalypse RPG based on "The Road Warrior" and other films,
set in the 24th century. It uses a skill-based system (roll 2d6
under skill) with detailed year-by-year character creation.
~31 pages HTML.

A humorous one-shot mini-RPG about robots trying to rebel against
their human masters, despite being bound by Asimov's Three Laws
of Robotics. Resolution is by rolling under stat + stat on 1d10.
The stats are Logic, Compatibility, Motor Manipulation,
Destruction, Sensory, and Integrity. Character creation is to
have all stats start at 2, then take four rolls on the attachments
table. The GM secretly randomly generates five goals for the PCs
on a table, which the PCs must fulfill to become sentient and
escape their slavery.
11 pages (PDF).

A humorous RPG on the premise of teenage offspring of
Lovecraftian horrors who go to high school with humans (along the
lines of "Teenagers from Outer Space"). Various other homebrew
rules also linked.
~25 pages rules and background (HTML).

A humorous RPG about delinquent aliens with various abilities who
have been exiled to a college frat house in the year 2187.
Character creation is limited point-based: spending 10 points
on alien abilities (one core and two non-core); and spending
another 10 points on the two attributes (physical and mental).
Resolution is that characters always succeed, but may have a
consequences of their action - rolling a pool of d6s based on
a universal table of their skill, where every 1-2 indicates
"damage".
30 pages rules and background (PDF).

A futuristic conspiracy RPG, set in the 22nd century where a
communist government has taken over the world and holds the
masses (the "Know-nots") in a backwards existance. It uses a
dice pool system of rolling (attribute+skill) d10's, where each
die over the difficulty counts as one success. Character
creation is random-roll attributes and point-bought skills.
166 pages PDF.

The original 1993 edition of the commercial game, "SLA Industries" --
a science fantasy RPG of futuristic urban horror, set in a
distant future (the "World of Progress") where an amoral arms
corporation ("SLA Industries") has taken over the universe,
headed by a power being named "Slayer". PC's work as agents for
the company, based on the world-city "Mort". There are 7 races,
including users of "The Ebb" -- a magical power that permeates
the universe. The system uses 2d10+skill+modifiers to determine
success (11+ is a success, 21+ is a notable success). Character
creation uses race (1 of 7) and career (1 of 9) templates
followed by point allocation.
304 pages rules and background (PDF).

A science fantasy RPG set in the distant future, where Slayer
squads battle supernatural monsters using big guns. It uses a
simple percentile system with random-roll characters.
~15 pages MSWord format.

A humorous space opera RPG, where the PCs play "Femme Babe"
companions of the space rat, Jack Cosmos, who do all the work for
which he gets credit for. Character creation is limited point
based (a fixed attribute distribution, pick 5 skills). Stats are
on a 7-step scale, with action resolution rolled on 2d6 on a
universal table of the 7-step scale.
25 pages (PDF).

A space-faring sci-fi RPG set in 2221, set in known space roughly
50 light-years around Earth. It has an incompletely written-up
rules system, with limited point-based chargen, and action
resolution by roll under skill on 1d100.
~75 pages background (HTML) plus ~50 pages rules (HTML).

A sci-fi martial arts genre RPG. It is apparently set in
modern-day Earth after a god travelled back in time to deal with
invading aliens. Now various humans have mystic powers and well
as inventions through mystical aid. Character creation is
class-based, split between human, cyborg, and robot character
types. Resolution is using a d20 on a universal table or
percentile rolls.
88 pages rules (MSWord).

A science fiction game inspired by Frank Herbert's Dune,
using a variant of the original edition Dungeons and Dragons
rules emphasizing combat without guns and political intrigue.
It is published under the Wizards of the Coast Open Gaming License.
Character classes include Empath, Face Dancer, Mentat, Telepath,
and Star Warrior.
126 pages (PDF).

A sci-fi RPG set in the world of the computer game "Starcraft"
from Blizzard Entertainment, using a version of WEG's D6 system.
It includes all the basics for D6 games (using a modified D6
classic system), information on each of the three races in
Starcraft, stats for equipment, structures and upgrades, and
psionics rules.
~100 pages (HTML).

This is an adaptation of the movie and TV series Stargate
for West End Game's D6 System. It was originally a commercially
commissioned work, but WEG was going bankrupt and it was
cancelled.
~60 pages HTML.

An adaptation of the TV series "Stargate SG-1" for GURPS Lite
as well as Classic Traveller and 2300 AD. This is not a
standalone game, but should be playable with the free GURPS Lite
edition.
91 pages (PDF).

The beta version of a sci-fi RPG set in the shared-world
universe introduced in novels by Margaret Weis and Tracy Hickman.
Official support has been dropped, but the rulebook and background
are available as files which can be downloaded after subscribing
to the Yahoo group. (You can choose to receive no email from
the group.) The system is a basic 2d6 rolling under skill or
attribute.
306 pages PDF.

A science fiction RPG set in the year 3200, six centuries after a
metadimensional pulse killed all psychics and cut off interstellar
travel. Humanity is scattered and just beginning to recover from
centuries of isolation. It uses a variant of the early ("old school")
D&D, inspired by the "Old School Renaissance" design movement.
Character creation is by rolling 3d6 for the six attributes and
choosing a class, along with a background package, training package,
and homeworld. The three classes are: Warriors, Experts, and Psychics.
Skill resolution is by rolling 2d6 + skill + attribute modifier vs.
difficulty number. Combat rolls are 1d20 + target's Armor Class +
attacker's Combat skill, attribute modifier, and attack bonus.
A result of 20 or more is a hit. The core rules include starships
and a starship combat system, using the same hit roll and rules for
shifting metadimensional phase.
210 pages rules and background (PDF).

The full English-language text of the published game, an adaptation
of the Finnish Star Trek parody film of the same name. The PCs
are members of the P-republic, an advanced society of "radical
godless commie feminist liberal pinkos". It uses a simple
system where you roll 2d6 and try to get higher than your Inability
score -- which is one of Stupidity, Obliviousness, Clumsiness,
Repulsiveness, and Weakness. There are four classes: Incompetent
Idiot, Annoying Nerd, Psychotic Loud-Mouth, and Frustrated Grouch.
Your class grants you from 0 to 2 special talents.
30 pages rules (PDF).

A game set in an American city ("New Providence") in an alternate
1920s where strange new technology is being used by the mafia to
commit crimes -- such as 12-foot robotic suits known as "Kodiaks".
Action resolution is 2d6 + stat/skill vs difficulty. Character
creation is limited point-based, with five attributes and
freeform skills.
13 pages (PDF).

A sci-fi RPG set in a distant galaxy inhabited by many sentient
species, ranging from the typical (Archadians: bipedal, savage
felines) to the unusual (Derra: tetralaterally-symetrical,
two-meter tall, foppish crustaceans) to the truly bizarre
(Volan: 100-milliliter puddles of single-celled creatures
with a mass-intellect that can directly control electronics).
Character creation is random-roll attributes and point-bought
skills. Action resolution is stat + 1d10 for checks or 2d10 +
modifiers for combat.
~75 pages background and rules (HTML).

A roleplaying game of the far future, where characters work
for AIs who can send themselves messages from the future.
Attributes are based on built-in technology, and players
can use Twists to affect the plot. Character creation is by
assigning four Core Values (i.e. beliefs), assigning any number
from 1 to 10 for each of the five Capabilities, spending a number
of points for Themes (roughly 10 - half of your highest attribute),
and spending on skills (based on the sum of two stats).
Resolution is by taking the higher of 1d10 times attribute
and 1d10 times profession (where "0" counts as zero).
The story can be changed by spending Twists, which are gained
and used based on Themes.
186 pages (PDF).

A universal RPG with a default setting of a dark near-future in
the year 2010. Current genres include a dark future in 2010,
a cyberpunk year 2050, and a fantasy setting. Action resolution
is 1d20 roll over (Difficulty minus Skill). Character creation
is open point-based.
101 pages PDF.

A French-language sci-fi RPG system, including vehicle and
mass combat supplements. The system was also adapted to the
setting from the Halo video game series from Bungie Studios
as the Halo JDR (Jeu de Role).
92 pages core rules (PDF) plus 19 page vehicles supplement (PDF) and
27 page mass combat supplement (PDF).

The free preview version of a commercial adaptation of the D20
System for the Traveller science fiction setting. It uses the
D20 license and thus does not include complete rules for character
creation and advancement. It presents a single class (Merchant)
along with skills, feats, various rules for combat, technology,
travel, and alien worlds.
65 pages rules (PDF).

A cyberpunk genre RPG based on the "mid20" variant of the rules
released in the D20 SRD. It is a standalone system with complete
character creation, skill, and combat rules. Action resolution
is taking the middle roll of 3d20, plus attribute and skill vs
difficulty. Character creation is random-roll attributes (eight
attributes rated -5 to +5), class selection, and point-bought skills.
61 pages rules (PDF).

A "Dr. Who" role-playing game, the complete copy of an
out-of-print game originally published in 1991. It
includes simple rules (stat+roll vs difficulty), as well
as extensive write-ups for characters from the series and
a sample adventure.
165 pages (PDF, PostScript, or text-only).

An adaptation of the animated TV series for the White Wolf
Storyteller system. It requires familiarity with the Storyteller
system (from any of the World of Darkness games), but includes
some complete rules sections.
~90 pages HTML.

This is a preview version of the Traveller20 game, which is
an adaptation of the original Traveller RPG (from Far Future
Enterprises) to the "D20" system from D&D third edition.
The lite rules include complete listings for all skills and
feats. However, it refers to the D&D Players handbook
for basic combat rules, which it modifies extensively. It also
includes only the Merchant class, as opposed to 16 classes in
the non-free game.
64 pages (PDF).

A free introductory version of the commercial sci-fi RPG Trinity,
where the players characters are superheroes - called Psions - in
in the 22nd century who defend the Earth from twisted "Aberrants".
It uses a version of the Storyteller dice pool system.
28 pages rules and background (PDF).

An RPG based on the "X Files" TV series. It uses a dice pool system
of d12's, with special results on 11 or 12 -- roll dice equal to
attribute, take highest roll (1-10) plus specials and add skill
vs difficulty. Character creation is either random-roll or
limited point-bought attributes and point-bought skills.
~40 pages HTML.

A science fantasy sourcebook for use with the free
Cineflex system. It is set on the
planet Atreion, whose sun has been dimmed to a red ember by
dark magic and man fights for survival against the growing
cold and the forces of Shadow. It is a world of both magic
and weird science.
~75 pages (HTML).

A French-language sci-fi RPG, with a short "light" rules
document in English.
5 pages English "light" rules (MSWord format),
119 page French players book (MSWord, PDF, or RTF),
151 page French GM's book (MSWord, PDF, or RTF).

A play-by-post game set in the world of the Alien movie
series. It uses a homebrew system with limited-point buy (80
attributes points, pick 5 normal and 3 specialized skills).
~6 pages character creation rules (HTML).

A near future RPG (C. 2018) set in the United Kingdom, inspired
by the Greg Mandel books of Peter F. Hamilton. The setting is
cyberwear and emphasizes subtlety. Character creation uses
random-roll attributes and point-bought skills. Action
resolution uses roll under skill on 1d100.
58 pages basic rules (MSWord).

A freeware space opera RPG set in the year 3029, with various
races inhabiting a galaxy in turmoil. Megacorporations hold sway
where the old Earth empire does not. Genetic technology has also
unlocked a seemingly magical power known as "lording".
~120 pages HTML rules and background in various files.

A spacefaring hard scifi RPG. It uses a universal table where
2d6 plus skill gives the number of successes, and a result of 10
or more indicates success.
130 pages rules and background (PDF)
plus 33 pages spaceship combat rules (PDF).

A simple science fiction RPG designed for pick-up play.
Character creation is partly random-roll attributes combined with
limited point-buy of attributes and binary skills. Resolution is
by roll under attribute on 1d20, +2 if you have an appropriate
skill.
10 pages PDF format.

A sci-fi RPG based on the War Wind video game from SSI. It is set
in a sci-fi universe, Yavaun, where four species war for freedom
or supremacy. It uses a very simple system of roll under stat
on 1d6.
~14 pages (HTML).

A sourcebook for the HERO system based on a post-apocalyptic
future featuring rules and background. It includes character
creation with random mutation tables, various technology
notes, and background.
~80 pages (HTML).

An RPG based on the original Star Trek series, using an adaptation
of the Microlite20 system. It is a
very rules-lite variant of the D20 system - with four attributes,
four races, and three classes (blue shirts, red shirts, and
yellow shirts).
46 pages core rules (PDF).

An RPG based on the video game "Wing Commander", played online
over IRC with a GM and a dice-roller program. It includes a
number of pages of background on the history, technology, and
other information. The downloadable rules use a percentile
skill-based system with limited point-based character creation.
68 pages rules (MSWord) plus ~20 pages background (HTML).

An Italian-language sci-fi RPG, using a simple rules system.
Character creation is point-bought attributes with no skills
per se. Actions are resolved by rolling d20 + attribute to
get over 11.
~24 pages HTML.

"Roleplaying the Corporate Wars of the Future". A cyberpunk RPG
set in Japan, where the PC's are agents for warring
corporations. It uses a very simple system with binary skills.
If you have a skill, you roll 7 or less on 2d6 to succeed. If
you don't have a skill you must roll 5 or less. There are
additional rules for combat. Character creation is by choosing a
template plus 5 other skills.
~100 pages rules and background (HTML).

A generic science fiction RPG inspired released under Creative Commons.
It uses the same step die system as Kapow! and
Zap!. Resolution takes the higher of two rolls -
with option to add to your roll by taking a hindrance or losing
stamina. Character creation includes picking a templates
(Crew, Badass, Scientist and Unique are default) that define
your attributes and power choices - customized by adding three
Boosts.
115 pages core rules (PDF).